This Massachusetts company has introduced the Model RPM-1 Room Pressure Monitor for maintaining room to room differential pressures. Ideally suited to applications where IAQ is an issue, the unit can be used in hospitals, clean rooms or where biomedical research is taking place. Maintaining proper negative or positive room pressures help to avoid the spread of disease or other contamination. The unit surface mounts and is easy to install. All electrical and mechanical components are housed in a tough, clear polycarbonate cover for easy viewing.

General Eastern/Modus, 20 Commerce Way, Woburn, MA 01801; 800/223-3208.